Whipstock



J. S. ABERCRMEEE.

WHIPSTOCK March ML, 1.933.

@ieg g Septenieer it?, 193%., -Jo. 832,532.,

s to en improvement n eidetreckiiig opi'fvention relate v iis. .e criii bit nes been twisted ofi' or e weit or where some other pipe or to time iecome o'geii in the Weit bore i "position that it ie impossible or u k L to remove them, it is desirebie to f the weit "core so it wiil oe de an incinetion end in this manner tie 'pees erorinct the obstruction in tio eii incre i/Vitifi this lin min t i' tice to position e, tooi or instrueii `fooi-e cioeeiy above the oo- 'i'lcie that tire riiii'ng i i: "eey be reso-ined, end the fee ."eeioretion 1 this einpt "mit pass @oeiotr tire 'wiiiostoci tie obgecte o tire invention to to l. wtiicii nre-y be oositioneo e :J v1 `v`\r f- 5 *o More the ooeti nceion to oto invention to proa" elongated toont cutter Ycieieoting 4iece end retiiro wir, which is edep o stringo' pip e Whigostocx.,

avention is 'to pro u through which e timid may .ted or pompe-i in positioning the over the junk or obstruction in the weit.

The @resent eppiicetion ie e (iivisiori ot my eeffier co-pending e'ppiicetion Serial No. NSA-i4, :tor o whipstoci, iiiefi Mey It?, i925.

'invention 'Wiii be 'cest uncierstood by reference to the eccompenying tiren:- ing we erein l shows e side View of e weli bore wherein the Wtiipstock ties tseen positionei oioove the obstruction. end the dritt init ie pictoreci es being detected by the Whipm .mld

43 stock to stitute the side-trecng operetion. L

27 3 enel 4 are sections teken on the tine 2-2, 3T3, and erespectively o Fig.

it envi showing the conguration of the blt deecting sur'ece. l

The Weil bore is indicatori genereiy et 1 end this is the origiim bore which was keine. driiied with the init which is pictureci et 2. For some reason or other the driii stem 3 connected to the bit 2 has broken es et leaving e portion of the rill stem, the 'ciriii co1- ier, and the drill bit in the hote. if sect1 e twist of? or breek occurs Where the upper enti et is in e soit formation, it is quite iiebie that the upper end wii become embecie in n it, so that the obu u the formation. as pictured `in it is practically impossible Ito remove struction by any iorin oi fishing tooi. obstruction may, however., be any other in.-

strument or toot which hes become iost in the i weii.

The invention is described, ino-Wever, in connection with e twisted off driii toit., which is e common vform oi obstruction encountereoi in the weil. Regeriees oi the type o' ob- :struction9 the wiiipstock i eviti te ron into the 'ef-eil being connectel et opper enf'i et i to e, suiteoie string of pipe or driii stem. The upper end 5 ot 'teejwtaiph stock is eiio'wn es tiireexieii t to receive the iower end of the string of pipe., The pine sections are connected; enoi 'to end so that the Whipstocic is lowered into the Weit. There is o passage i9 progileoi through the Whipstook., through the threed 6, enti which peesege terminates in ttieopeninge il et timel `tower end 7 of the wiripetockl1` Thiepeesoge is provided so that circulation tney ineinteined Wiiiie the whipstock is being ioweredi into position andv thus prevent freezing of. the iusiiing uid in the Weii bore Weit ee, to wesh ewey any cevings or sediment which has iodgefi directly ebove, the junk or otistruction in the Weil. Verious methoie ere. followed in orienting the whipstook so ttiet the continuation of' the Weil bore Witt tie in' the desired direction. v

After the Whipstock has been positioned the string of pipe mey be disconnected from the threads 6 and removed from the weil. H the Whipstock is cemented in. position the cement is aiiowed to set end then the dritt oit 15 is run into the Weil until it etrikes the bit deecting surface 16 on the whipstock. riihe peculiar construction of the toit eieiit-actI eeY :. of pipe into said whipstock.

surface is disclosed in the parent application of which the present application is a division.

What I claim as new is:

1. A whipstock, comprising an elongated body having a cutter deflecting upper face,- and having a vertical course therethrough adapted for communication with a string of 1 e. p A whipstock for wells including a body, a connection on the upper end thereof for an .operative string of lp, and a passage thru said body whereby uid may be passed from the operative string of pipe thru said body.

3. A whipstock for sidetracking well bores including a threaded connection on the upper end thereof, adapted to receive a. string of pipe for setting the whipstock, a passage extendin from said connection adapted to allow fluld to be passed from the setting string 4. A whipstock thru which circulation may be had including a body, said body having a passage longitudinally thereof, and means for connecting a pipe to said whipstock whereby fluid may be passed thereinto.

In testimony whereof I hereunto aiix my signature this 10 day of August, A. D. 1932.

JAMES S. ABERCROMBIE. 

